# validate signature for transaction

@startuml
participant client_service as cls
participant server_service as srv
control     signature_process     as ctrl
database    Database    as db
entity      system      as sys
cls -> srv : send token and send signature 
srv -> ctrl : connect to db
ctrl -> db : validate client id
group not found 
    db -> srv : response unauthorized
end
ctrl -> sys : validate signature
group verification process fails
    sys -> ctrl : failed verify signature
    ctrl -> srv : response unauthorized
end

sys -> ctrl : verification process success
ctrl <-> sys : validate token
group verification token fails
    sys -> ctrl : failed verify token
    ctrl -> srv : response unauthorized
end
ctrl -> cls : return response service
@enduml